Calking the



(No Model.) A. RST'UBBS.

GALKING THE sEAM-s 0P CENTER BOARD WELLS. No. 370,663. I Patented Sept.27.1887.

Witnessek: Inv'bhi-o r.

' UNITED STATES PATENT OFFIC ABEL F. STUBBS, OF BANGOR, MAINE.

CALKING THE SEAMS' OF CENTER-BOARD WELLS.

SPECIFICATION forming part of Letters Patent No. 370,663, datedSeptember 27,'1887.

Application filed February 8, 1887. Serial No. 226,891.

To all whom it may concern:

Be it known that I, ABEL F. STUBBS, a citizen of the United States,residing at Bangor, in the county of Penobscot and State of Maine, haveinvented a new and useful Device for Holding the Oalking in the Seams ofthe Wells of Center-Board Vessels; and I do hereby declare that thefollowing is a full,

clear, and exact description of the invention,

which will enable others skilled in the art to which it appertains tomake and use the same. My invention relates to an improved device forholding the calking in the seams of the Wells of center-board vessels,and is illustrated in the accoinpanying drawings, in which-- Figure 1 isan isometric view of a seam calked and partially fitted with my device.Figs. 2 and 3 are isometric views showing, respectively,,the front andback of one form of my device. Figs. 4, 5, and 6 are cross-sections ofmodifications of my device, showing different forms of corrugations.

Similar letters refer to corresponding parts throughout the figures.

The seams of the bulls of vessels are calked from the outside. Thepressure of the water being fr'om without inward and in the direction inwhich the calking is driven, serves to assist in keeping the calking inposition. In centereboard vessels, however, the pressure of the water inthe well which incases the centerboard' is outward and in the directionopposite to that in which the calking is driven, and thus constantlyoperates to force out the calking of (No model.)

be affected by the straining of the vessel and theopening and closing ofthe seams.

I accomplish my object by providing narrow strips, A,of sheetmetahpreferably copper, yellow metal, or galvanized iron, formed with alongitudinal corrugation, B, of such width as to fit in the seamsbetween the planking of the sides of the Well and having sufficientwidth on each side the corrugation to admit of securing the strip to theadjacent edges of the planking on each side the seam by screws, nails,or other appropriate means.

The corrugation may be of any convenient shape in cross-section, anddifferent shapes are shown in Figs. 4, 5, and 6. It serves a doublepurpose. crowd the calking into the seams and keep it there, but thewhole device being constructed of somewhat flexible or elastic metal,the jaws of the corrugation open and close with the seams as the vesselstrains, thus affording sufficient give or play, and so preventing thestrips being torn from their fastenings.

Having thus described my invention, what I claim, and desire to secureby Letters Patent, 1s

A device for holding'the calking in the seams of the wells ofcenter-board vessels, consisting of a narrow strip of elastic orflexible sheet metal having a longitudinal corrugation shaped to fitinto the seams between the planks and of such width as to admit of itsbeing screwed or otherwise secured to. the edges of the planks on bothsides of the seam, substantially as described.

ABEL F. STUBBS. Witnesses:

HARRY D. STEWART, F. M. LAUGHION.

It not only operates to

